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Vulnerabilities

Vulnerability · CVE-2026-4394

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Published Apr 8, 2026 · catalog updated Oct 13, 2026 · Gravity Forms Gravity Forms

Patch now

CVE-2026-4394 is in the CISA known-exploited catalog. Confirm Gravity Forms Gravity Forms against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Medium6.1
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
0.38%
Remediation
Remediation guidance
Affected products
vendor Gravity Forms Gravity Forms

The Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Credit Card field's 'Card Type' sub-field ( ) in all versions up to, and including, 2.9.30. This is due to the method in the class outputting the card type value without escaping, combined with accepting and storing unsanitized user input for the parameter. The Card Type field is not rendered on the frontend form (it is normally derived from the card number), but the backend submission parser blindly accepts it if included in the POST request. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute when an administrator views the form entry in the WordPress dashboard.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Gravity Forms Gravity Formsversion unspecified

How to fix CVE-2026-4394

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-4394 is in the CISA known-exploited catalog. Confirm Gravity Forms Gravity Forms against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.38%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 8, 2026 · NIST NVD

    Detected

    The Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Credit Card field's 'Card Type' sub-field ( ) in all versions up to, and including, 2.9.30. This is due to the method in the class outputting the card type value without escaping, combined with accepting and storing unsanitized user input for the parameter. The Card Type field is not rendered on the fronten

  2. Jul 24, 2026 · NIST NVD

    Updated

    The Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Credit Card field's 'Card Type' sub-field ( ) in all versions up to, and including, 2.9.30. This is due to the method in the class outputting the card type value without escaping, combined with accepting and storing unsanitized user input for the parameter. The Card Type field is not rendered on the fronten

  3. Oct 13, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  4. Oct 13, 2026 · VulnCheck KEV

    Updated

    The Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Credit Card field's 'Card Type' sub-field ( ) in all versions up to, and including, 2.9.30. This is due to the method in the class outputting the card type value without escaping, combined with accepting and storing unsanitized user input for the parameter. The Card Type field is not rendered on the fronten

Sources

  • CVE.orgVulnerability recordCVE-2026-4394

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-4394

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-4394

    The Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Credit Card field's 'Card Type' sub-field ( ) in all versions up to, and including, 2.9.30. This is due to the method in the c

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2026-4394

    The Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Credit Card field's 'Card Type' sub-field ( ) in all versions up to, and including, 2.9.30. This is due to the method in the class outputting the card type value without escaping, combined

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.